diff mbox series

[v10,05/10] scsi: ufs: add quirk to fix abnormal ocs fatal error

Message ID 20200528011658.71590-6-alim.akhtar@samsung.com
State Superseded
Headers show
Series exynos-ufs: Add support for UFS HCI | expand

Commit Message

Alim Akhtar May 28, 2020, 1:16 a.m. UTC 
From: Kiwoong Kim <kwmad.kim@samsung.com>

Some controller like Exynos determines if FATAL ERROR (0x7)
in OCS field in UTRD occurs for values other than GOOD (0x0)
in STATUS field in response upiu as well as errors that a
host controller can't cover.
This patch is to prevent from reporting command results in
those cases.

Signed-off-by: Kiwoong Kim <kwmad.kim@samsung.com>
Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
Reviewed-by: Avri Altman <avri.altman@wdc.com>
---
 drivers/scsi/ufs/ufshcd.c | 6 ++++++
 drivers/scsi/ufs/ufshcd.h | 6 ++++++
 2 files changed, 12 insertions(+)
diff mbox series

Patch

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index ba093d0d0942..33ebffa8257d 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -4794,6 +4794,12 @@  ufshcd_transfer_rsp_status(struct ufs_hba *hba, struct ufshcd_lrb *lrbp)
 	/* overall command status of utrd */
 	ocs = ufshcd_get_tr_ocs(lrbp);
 
+	if (hba->quirks & UFSHCD_QUIRK_BROKEN_OCS_FATAL_ERROR) {
+		if (be32_to_cpu(lrbp->ucd_rsp_ptr->header.dword_1) &
+					MASK_RSP_UPIU_RESULT)
+			ocs = OCS_SUCCESS;
+	}
+
 	switch (ocs) {
 	case OCS_SUCCESS:
 		result = ufshcd_get_req_rsp(lrbp->ucd_rsp_ptr);
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index a9b9ace9fc72..e1d09c2c4302 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -541,6 +541,12 @@  enum ufshcd_quirks {
 	 * resolution of the values of PRDTO and PRDTL in UTRD as byte.
 	 */
 	UFSHCD_QUIRK_PRDT_BYTE_GRAN			= 1 << 9,
+
+	/*
+	 * This quirk needs to be enabled if the host controller reports
+	 * OCS FATAL ERROR with device error through sense data
+	 */
+	UFSHCD_QUIRK_BROKEN_OCS_FATAL_ERROR		= 1 << 10,
 };
 
 enum ufshcd_caps {